So last Saturday it was our monthly poker night and the usual crew were there. Me, Jo, Winston and Simon. Unfortunately, Jo's sister, Bea, was in town and had convinced us to let her join in.

We'd all known each other since we were kids, and Bea was one of those kids that was both a bad winner and a bad loser and none of us really liked her all that much. But it had been a few years since we'd seen her and with any luck she'd have matured a bit since then.

The plan was simple, play some cards, have a few drinks, retire to the living room, order in some food (dinner was on the winner, naturally) and watch TV.

So the game began and the drink started flowing, and after an hour or so I had a big pile of chips in front of me and everyone seemed to be having a good time, despite losing their money. Except for Bea, was the only other one left with a decent sized stack.

After a big win she had just under half the chips. I had more, but still, if I lost this one I'd be out next hand. I had an Ace and a four. The flop was all clubs, but it contained the four. Pair with an ace high. She bet high, I followed and called. The turn gave us another four. Three of a kind. Again, we both bet high. Much higher in fact. About a third of my stack was in play now.

Finally, the last card was turned up. Ace of Spades. Full house. I couldn't lose. But, clearly, she thought the same as she went all-in.

The look on her face when I called still haunts me today. It was almost beetroot and scowling. She nearly exploded when she revealed her Flush and I my Full House.

Congratulations were thrown around by the rest of the guys, commiserations and "well played"s handed out to Bea.

We stood to leave the table and Bea clearly 'accidentally' knocks the table, spilling the chips and, more stickily, the beer all over me.

I protest slightly and Jo looks naturally mortified at her sisters behaviour.

"Come on, Bea," Jo said, "maybe we should go"

A slight feeling of pity and a fit of mercy and incredibly poor - and drunken - judgement overcame me and I said "no, stay, I've still to buy you guys dinner anyway"

So I ordered food and we sat down in front of the TV. It was Saturday night, and our gambling session hadn't quite ended as a few of us had put on Lottery Tickets.

While we waited for food, we decided to watch the draw. I was sat on the couch, sandwiched between Bea and Winston. Excitement built up as two of my numbers came out at once, followed by a tense few seconds as the next two missed. Finally a third came out, I'd won a tenner. I felt Bea, beside me, start to get restless again. The second my fourth number, and my £100 win, came out, the ticket left my hand and was swiftly torn up by the enraged Bea. She burst into tears and ran out the door, knocking the incoming delivery guy over onto his arse, sending our food flying into the night.

It just goes to show you, that when the chips are down, and you think your number's up: Don't Stop Bea Leaving.